spring 整合mybatis教程

spring項目整合Mybatis

創建spring maven項目

pom.xml 文件中配置jar

<?xml version="1.0" encoding="UTF-8"?>

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.dongl</groupId>
    <artifactId>ssm</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>war</packaging>

    <name>ssm Maven Webapp</name>
    <!-- FIXME change it to the project's website -->
    <url>http://www.example.com</url>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.7</maven.compiler.source>
        <maven.compiler.target>1.7</maven.compiler.target>
        <spring.version>5.1.5.RELEASE</spring.version>
        <servlet-api.version>4.0.1</servlet-api.version>
        <spring-mybatis.version>1.3.2</spring-mybatis.version>
    </properties>

    <dependencies>
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-core -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-beans -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-aop -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aop</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <!-- spring事務 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <!-- spring的jdbc 鏈接 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <!-- spring整合mybatis -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>${spring-mybatis.version}</version>
        </dependency>

         <!-- 數據源jar -->
        <dependency>
            <groupId>commons-dbcp</groupId>
            <artifactId>commons-dbcp</artifactId>
            <version>1.4</version>
        </dependency>



        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.11</version>
            <scope>test</scope>
        </dependency>
        <!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>${servlet-api.version}</version>
            <scope>provided</scope>
        </dependency>


    </dependencies>

    <build>
        <finalName>ssm</finalName>
        <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
            <plugins>
                <plugin>
                    <artifactId>maven-clean-plugin</artifactId>
                    <version>3.1.0</version>
                </plugin>
                <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
                <plugin>
                    <artifactId>maven-resources-plugin</artifactId>
                    <version>3.0.2</version>
                </plugin>
                <plugin>
                    <artifactId>maven-compiler-plugin</artifactId>
                    <version>3.8.0</version>
                </plugin>
                <plugin>
                    <artifactId>maven-surefire-plugin</artifactId>
                    <version>2.22.1</version>
                </plugin>
                <plugin>
                    <artifactId>maven-war-plugin</artifactId>
                    <version>3.2.2</version>
                </plugin>
                <plugin>
                    <artifactId>maven-install-plugin</artifactId>
                    <version>2.5.2</version>
                </plugin>
                <plugin>
                    <artifactId>maven-deploy-plugin</artifactId>
                    <version>2.8.2</version>
                </plugin>
            </plugins>
        </pluginManagement>
    </build>
</project>

創建resource 文件夾
在resource 文件夾下創建

applicationContext.xml，

jdbc.properties,

spring-mybatis,

mybatis-config.xml 文件

目錄結構如下：

配置web.xml 文件

<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>
  <display-name>Archetype Created Web Application</display-name>

  <!-- 2、指定IOC 容器applicationContext.xml的位置或 默認放在WEB-INF下 -->
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>
        <!-- 加載多個配置文件 -->
        classpath:applicationContext.xml,
        <!--classpath:applicationContext-*.xml-->
    </param-value>
  </context-param>
  
  <listener>
    <!-- 1、配置spring-web.jar 提供的監聽器，此監聽器可以在服務啓動時，初始化IOC容器
      告訴監聽器 applicationContext.xml 的位置-->
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>


</web-app>

配置applicationContext.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">

    <!-- 引入Mybatis數據源 -->
    <import resource="mybatis-config.xml"></import>

</beans>

配置 spring-mybatis,文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">
    <!-- 引入數據源配置文件 -->
    <bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="location" value="classpath:jdbc.properties"></property>
        <!--<property name="Locations">-->
            <!--<list>-->
                <!--<value>classpath:jdbc.properties</value>-->
            <!--</list>-->
        <!--</property>-->
    </bean>

    <bean id="dataSource" class="${dataSource}" destroy-method="close">
        <property name="driverClassName" value="${jdbc.driver}"></property>
        <property name="url" value="${jdbc.url}"/>
        <property name="username" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
        <property name="maxActive" value="10" />
        <property name="maxIdle" value="5" />
    </bean>
    <!-- 配置sqlSessionFactory，SqlSessionFactoryBean是用來產生sqlSessionFactory的 -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 引入數據源 -->
        <property name="dataSource" ref="dataSource"/>
        <!-- 指定mybatis自身的配置文件 -->
        <property name="ConfigLocation" value="classpath:/mybatis-config.xml"/>
        <!-- 自動掃描mapper.xml 文件 -->
        <!--<property name="mapperLocations" value="classpath:mybatis/mapper/*-mapping.xml"/>-->
    </bean>

    <!-- DAO接口所在包，Spring會自動掃描其下的類 -->
    <bean id="mapperScannerConfigurer" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.dongl.dao"/>
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
    </bean>

    <!-- 事務管理  -->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>
    <tx:annotation-driven transaction-manager="transactionManager"/>




</beans>

配置Mybatis-config.xml 文件

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    <!--
    配置順序	(properties?, settings?, typeAliases?, typeHandlers?, objectFactory?,
 objectWrapperFactory?, reflectorFactory?, plugins?, environments?, databaseIdProvider?, mappers?)
     如果配置順序不對，會出現一些意想不到的錯誤
     -->
    <!--
     | 全局配置設置
     |
     | 可配置選項                   默認值,     描述
     |
     | aggressiveLazyLoading       true,     當設置爲‘true’的時候，懶加載的對象可能被任何懶屬性全部加載。否則，每個屬性都按需加載。
     | multipleResultSetsEnabled   true,     允許和不允許單條語句返回多個數據集（取決於驅動需求）
     | useColumnLabel              true,     使用列標籤代替列名稱。不同的驅動器有不同的作法。參考一下驅動器文檔，或者用這兩個不同的選項進行測試一下。
     | useGeneratedKeys            false,    允許JDBC 生成主鍵。需要驅動器支持。如果設爲了true，這個設置將強制使用被生成的主鍵，有一些驅動器不兼容不過仍然可以執行。
     | autoMappingBehavior         PARTIAL,  指定MyBatis 是否並且如何來自動映射數據表字段與對象的屬性。PARTIAL將只自動映射簡單的，沒有嵌套的結果。FULL 將自動映射所有複雜的結果。
     | defaultExecutorType         SIMPLE,   配置和設定執行器，SIMPLE 執行器執行其它語句。REUSE 執行器可能重複使用prepared statements 語句，BATCH執行器可以重複執行語句和批量更新。
     | defaultStatementTimeout     null,     設置一個時限，以決定讓驅動器等待數據庫迴應的多長時間爲超時
     | -->
    <settings>
        <!-- 開啓駝峯自動映射 -->
        <setting name="mapUnderscoreToCamelCase" value="true" />
        <!-- 二級緩存的總開關，被redis替代 -->
        <setting name="cacheEnabled" value="false" />
        <!-- 全局啓用或禁用延遲加載。當禁用時，所有關聯對象都會即時加載 -->
        <setting name="lazyLoadingEnabled" value="true"/>
        <setting name="multipleResultSetsEnabled" value="true"/>
        <setting name="useColumnLabel" value="true"/>
        <setting name="defaultExecutorType" value="REUSE"/>
        <setting name="defaultStatementTimeout" value="25000"/>
        <!-- 讓控制檯打印sql語句，註釋掉則沒有 -->
        <setting name="logImpl" value="STDOUT_LOGGING" />
        <setting name="callSettersOnNulls" value="true" />
    </settings>
</configuration>

配置jdbc.properties 文件

#db.properties
dataSource=org.apache.commons.dbcp.BasicDataSource
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://192.168.1.107:3306/test
jdbc.username=root
jdbc.password=123456

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